How will it be true to say about that [earthly] tabernacle that only “the innocent in hands and pure in heart, who did not receive his soul in vain,” will inhabit it, when the history of the kings transmits that the worst priests, “sons of pestilence,” have dwelt in the tabernacle of God and the ark of the covenant itself also was captured by foreigners and detained with the impious and profane? From all of this it is evident that the prophet felt in a far different sense about this tabernacle in which he says that only “the innocent in hands and pure in heart, who did not receive his soul in vain nor do evil to his neighbor and did not accept reproach against his neighbor” will dwell. It is necessary, therefore, that the inhabitant of this tabernacle which the Lord erected, not man, be such a person.
Source: HOMILIES ON EXODUS 9.2